Regarding the original post, remember that you can still "push the boundaries of you". Sounds like some barmy quote from Dr. Phil (in his infinite bald patch of wisdom) but I think it's not that uncommon that many put silly limits on what they're supposed to be doing and don't pay enough attention to what they'd really like to be doing, if they gave it a chance. For me, it's a daily struggle. (<-- Also not a quote from Dr. Phil.)
Nike said, "Just do it."
I say, "You only get one shot at doing - whatever - you - like, and that is your life."